Theriac

[EllieV]

It is certainly correct that the herbs shown in the Voynich MS do not (clearly) match any sequence known from other herbal MSs, but the herbal or botanical part of it (one can name it what one wants) is clearly modelled after medieval herbal MSs.

I agree. I haven't seen matching sequence in manuscripts, Theriac lists or other lists - like Charlemagne's 99 plant list from Capitulare de villis vel curtis imperii or alchemy herb lists. However, similarities were found by different researchers with all of these sources.

Regarding the mineral - the blue cube - Steve D. suggested the possibility it could be Persian blue salt (although it is not clear if the coloring in the VMs was done by the author - so color-wise we should take every idea "with a grain of salt"